Current status of restoration work for obstacle and upper core structure in reactor vessel of experimental fast reactor "Joyo", 2-2

Okuda, Eiji; Ito, Hiromichi; Yoshihara, Shizuya

An accident occurred in experimental fast reactor "Joyo" in 2007 which is obstruction of fuel change equipment caused by contacting rotating plug and MARICO-2. In addition, we confirmed two happenings in the reactor vessel that (1) Deformation of MARICO-2 subassembly on the in vessel storage rack together with a transfer pot, (2) Deformation of the Upper core structure of "Joyo" caused by contacting MARICO-2 subassembly and the UCS. We do the restoration work for restoring it. This time, we describe current status of Replacement work of the UCS.

Language	:	Japanese
Journal	:	UTNL-R-0486
Volume	:
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Pages	:	p.6_1 - 6_10
Publication Year/Month	:	2014/03
Meeting title	:	平成25年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
Held date	:	2014/03
Location (city)	:	東海
Location (country)	:	日本
Patent information	:
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DOI for research data	:
Keywords	:	no keyword
Research Facility	:	常陽(高速増殖炉実験炉)
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Article of JAEA R&D Review	:
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Registration No. : BB20133461
JAEA Abstracts No. : 42000677
Paper Submission No. : 14326

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